diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 778d40b81..faad02173 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -914,7 +914,7 @@ class CoursesController < ApplicationController
           teacher_already_exist = current_user.teacher_of_course_non_active? course
           unless teacher_already_exist
             existing_course_message = CourseMessage.find_by(course_id: course.id, course_message_id: current_user.id,
-                                                            course_message_type: "JoinCourseRequest", status: 0, viewed: false)
+                                                            course_message_type: "JoinCourseRequest", status: 0)
             if existing_course_message.blank?
               course_message = CourseMessage.new(course_id: course.id, user_id: course.tea_id, status: 0,
                                                  course_message_id: current_user.id, course_message_type: "JoinCourseRequest",
@@ -929,7 +929,7 @@ class CoursesController < ApplicationController
               teacher_role = 1
               message = "#{course_message.content == 2 ? '助教' : '教师'}申请已提交，请等待审核"
             else
-              message = "#{existing_course_message.extra.to_i == 7 ? '助教' : '教师'}申请已提交，请等待审核"
+              message = "#{existing_course_message.content == 2 ? '助教' : '教师'}申请已提交，请等待审核"
             end
           end
         end
@@ -943,7 +943,7 @@ class CoursesController < ApplicationController
         end
       rescue => e
         uid_logger(e.message)
-        tip_exception("加入课堂失败")
+        tip_exception(e.message)
         raise ActiveRecord::Rollback
       end
     end